Semen quantity and quality varies not just between different men, but with the same man over the course of the month, the year, and over his whole life. Variances in color, viscosity and smell from month to month are normal, depending on stress levels, vitamin and mineral intake, hydration levels and hormone fluctuation. However, some changes in semen may reflect an underlying pathology such as a prostate disease or an STD. Learning more about penis health, nutrition, and going to the doctor ...

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